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DP83256VF Datasheet(PDF) 121 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # DP83256VF
Description  PLAYERa??Device (FDDI Physical Layer Controller)
PDF  144 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

DP83256VF Datasheet(HTML) 121 Page - National Semiconductor (TI)

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70 Electrical Characteristics (Continued)
AC Characteristics for the Alternate PMD Interface
The following input signals are covered PMD Indicate Data (PMID) Signal Detect (SD) Receive Data In (RXD
IN) Receive
Clock In (RXC
IN)
The following output signals are covered PMD Request Data (PMRD) Transmit Clock (TXC) Recovered Data Out
(RXD
OUT) Recovered Clock Out (RXC
OUT)
Note
The Alternate PMD Interface is only available on the 160 pin DP83257 PLAYERa Device and the 100 pin DP83256-AP Device The Transmit Clock is
enabled by the CGMREGTXCE bit The rest of the Alternate PMD Interface is enabled by the APMDREGAPMDEN bit
Symbol
Parameter
Conditions
Min
Typ
Max
Units
T40
RXC
OUTa to RXD
OUTg Change Time
10
50
ns
T41
PMIDg to RXD
OUT Latency
In Lock
16
ns
T42
RXD
INg to RXC
INa Setup Time
40
ns
T43
RXD
INg to RXC
INa Hold Time
05
ns
T44
TXCa to PMRDg Change Time
40
70
ns
T42
SD Minimum Pulse Width
120
ns
T45
RXC
OUTg Pulse Width High
(Note 1)
35
45
ns
T46
RXC
OUTg Rise Time
(Note 1)
15
ns
T47
RXC
OUTg Fall Time
(Note 1)
15
ns
T48
RXD
OUTg Rise Time
(Note 1)
15
ns
T49
RXD
OUTg Fall Time
(Note 1)
15
ns
T50
TXCg Pulse Width High
(Note 1)
35
45
ns
T51
TXCg Rise Time
(Note 1)
15
ns
T52
TXCg Fall Time
(Note 1)
15
ns
T38
PMRD Rise Time
(Note 1)
15
ns
T39
PMRD Fall Time
(Note 1)
15
ns
Note 1
This parameter is not tested but is assured by correlation with characterization data
TLF11708 – 52
FIGURE 7-11 ECL Rise and Fall Times
121



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